Heh. I predicted a comment like this would be here before I even opened the comments page. "Getting rid of malaria is nice and all, but those people will still be poor." (I also expected, "Are we really sure that saving the lives of so many people is a good idea?", but fortunately that comment isn't here yet.)
It's difficult to have much empathy for people whose lives are so far removed from our own. For most of us, cancer is the boogeyman: most of the people here have had at least one friend or relative affected by it. What would you say to someone that suggested that saving the lives of cancer victims wasn't a worthy cause?
> ...there's more worthy causes to spend our efforts on in those areas where malaria is prevalent.
You are welcome to spend your efforts wherever you like. Gates has decided to spend his efforts on malaria. There is no room for an "our" there, unless you are a significant part of the Gates Foundation. I'm grateful that the mob doesn't get to decide how Gates spends his resources.